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Communication | Regular issue | Vol 4, No. 5, 1976, pp.973-977
Published online, 1st January, 1970
DOI: 10.3987/R-1976-05-0973
Synthesis of the Clavine Skeletons by Photocyclisation of N-Methacrylnaphthalides

Ichiya Ninomiya,* Toshiko Kiguchi, and Takeaki Naito

*Kobe Women’s College of Pharmacy, Motoyamakita, Higashinad, Kobe, Hyogo 658, Japan

Abstract

Photocyclisation of N-methacrylnaphthalides (Ia-d, and VIII), prepared from various 2-naphthylamines and 4-aminonaphthostyril, afforded the benzo[f]quinolones (IIa-d) and indolo[4,3-f,g]quinoline-5,8-dione (IX), providing a route for the preparation of the clavine alkaloids.